KR102353737B1 - Floating image display device - Google Patents

Abstract

An embodiment of the present invention relates to a floating image display device capable of displaying a floating image using a transparent display device and a reflective mirror, and capable of changing the display position of the floating image by changing the curvature and/or position of the reflective mirror will be. A floating image display device according to an embodiment of the present invention includes a transparent display device and a reflective mirror. The transparent display device includes a transparent display panel in which pixels each including a transmissive part for transmitting light and a light emitting part for emitting light on one surface are provided. The reflective mirror is disposed on the one surface of the transparent display panel, and reflects the image displayed on the transparent display panel to be displayed as a floating image on the outside of the opposite surface of the one surface of the transparent display panel through the transmitting portions of the pixels.

Description

Floating image display device {FLOATING IMAGE DISPLAY DEVICE}

An embodiment of the present invention relates to a floating image display device.

The flat panel display device, which started with the development of LCD (Liquid Crystal Display), has been widely used in smartphones and It is being applied to laptops, monitors and TVs as well as small mobile devices such as tablets. Recently, flat panel displays are being developed as flexible displays that can be bent or folded and transparent displays that can see the background.

In particular, recently, transparent display devices are manufactured to be transparently implemented using OLEDs. A transparent display device using an OLED is implemented transparently when an image is not displayed, and displays an image when an image is displayed.

On the other hand, a conventional floating image display device uses a floating lens such as a convex lens or a Fresnel lens to display an image displayed by an integrated image type display device as a floating image. implemented with In this case, since the floating image cannot be implemented at a position less than the focal length of the floating lens, there is a problem in that there is a limitation in the viewing distance for viewing the floating image.

An embodiment of the present invention provides a floating image display device capable of displaying a floating image using a transparent display device and a reflective mirror.

In addition, an embodiment of the present invention provides a floating image display device capable of changing the display position of the floating image by changing the curvature and/or position of the reflection mirror.

A floating image display device according to an embodiment of the present invention includes a transparent display device and a reflective mirror. The transparent display device includes a transparent display panel in which pixels each including a transmissive part for transmitting light and a light emitting part for emitting light on one surface are provided. The reflective mirror is disposed on the one surface of the transparent display panel, and reflects the image displayed on the transparent display panel to be displayed as a floating image on the outside of the opposite surface of the one surface of the transparent display panel through the transmitting portions of the pixels.

A floating image display device according to another embodiment of the present invention includes a transparent display device and a reflective mirror. The transparent display device includes a transparent display panel in which pixels each including a transmissive part for transmitting light and a light emitting part for emitting light on one surface are provided. The reflective mirror is disposed on the one surface of the transparent display panel, and reflects an image displayed on the transparent display panel to be displayed as a floating image of a virtual image behind the reflective mirror.

An embodiment of the present invention uses a transparent display device including pixels, each of which includes a transmissive part that allows light incident from the outside to pass therethrough and a light emitting part that emits light, respectively. As a result, according to the embodiment of the present invention, the image reflected by the reflective mirror disposed on the front surface of the transparent display device may be displayed as a floating image on the rear surface of the transparent display device through the transmitting portions of the transparent display device.

In addition, the embodiment of the present invention can adjust the focal length of the reflective mirror by adjusting the curvature of the reflective mirror. As a result, the embodiment of the present invention can adjust the position at which the floating image is displayed and the magnification of the floating image. That is, in the embodiment of the present invention, the floating image can be displayed at a position desired by the viewer or at a magnification desired by the viewer by adjusting the curvature of the reflection mirror using the tension providing means.

In addition, according to an embodiment of the present invention, the focal length of the reflective mirror may be adjusted to the outside of the rear surface of the transparent display panel by adjusting the curvature of the reflective mirror. As a result, the embodiment of the present invention may display a floating image as a virtual image on the back of the reflection mirror 200 .

In addition, according to an embodiment of the present invention, the floating image of the virtual image may be displayed on the back of the reflective mirror at a distance twice or more than the distance between the transparent display panel and the reflective mirror. For this reason, when the embodiment of the present invention is applied to a head up display (HUD) applied to a vehicle, by displaying a floating image as a virtual image on the back of the reflective mirror, the driver minimizes the change in the focal length of the eyes It can be implemented so that the head-up display information can be viewed while doing so.

Also, according to an embodiment of the present invention, a position at which a floating image is displayed and a magnification of the floating image can be adjusted by adjusting the distance between the reflective mirror and the transparent display panel. That is, according to the embodiment of the present invention, the distance between the reflective mirror and the transparent display panel can be adjusted by adjusting the positions of the first and second moving means using the moving means adjusting unit, so that the viewer can set the desired position or the viewer Floating images can be displayed at any desired magnification.

Furthermore, according to an embodiment of the present invention, external light incident on the rear surface of the transparent display panel is transmitted through the transmission portions of the transparent display panel using a λ/4 plate and a polarizing plate, is reflected by a reflective mirror, and then is again transmitted through the transmission portion of the transparent display panel. It is possible to prevent being recognized by the viewer by being transmitted through the.

1 is a perspective view schematically showing a floating image display device according to an embodiment of the present invention;
2 is an exploded perspective view showing a floating image display device according to an embodiment of the present invention;
FIG. 3 is an exemplary view showing the transparent display device of FIG. 2 ;
FIG. 4 is an exemplary view showing a pixel included in the display area of FIG. 3 ;
Fig. 5 is a cross-sectional view taken along line II' of Fig. 4;
6A to 6C are exemplary views showing a reflective mirror.
7 is a side cross-sectional view showing an example of the floating image display device of FIG. 1 in detail;
8 is an exemplary view illustrating a floating image displayed by a transparent display panel and a reflection mirror having a first curvature;
9 is an exemplary view illustrating a floating image displayed by a transparent display panel and a reflective mirror having a second curvature;
10 is an exemplary view illustrating a floating image displayed by a transparent display panel and a reflective mirror having a third curvature;
11 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail;
12 is an exemplary view illustrating a floating image displayed when a distance between a transparent display panel and a reflective mirror is a first distance;
13 is an exemplary view illustrating a floating image displayed when a distance between a transparent display panel and a reflective mirror is a second distance;
14 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail;

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described with 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

"X-axis direction", "Y-axis direction", and "Z-axis direction" should not be interpreted only as a geometric relationship in which the relationship between each other is vertical, and is wider than within the scope where the configuration of the present invention can function functionally. It may mean having a direction.

The term “at least one” should be understood to include all possible combinations of one or more related items. For example, the meaning of “at least one of the first, second, and third items” means that each of the first, second, or third items as well as two of the first, second and third items It may mean a combination of all items that can be presented from more than one.

Each feature of the various embodiments of the present invention can be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments may be independently implemented with respect to each other or implemented together in a related relationship. may be

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically showing a floating image display device according to an embodiment of the present invention. 2 is an exploded perspective view illustrating a floating image display device according to an embodiment of the present invention.

1 and 2 , a floating image display device according to an embodiment of the present invention includes a transparent display device 100 , a reflective mirror 200 , and a reflective mirror accommodation cover 300 .

The transparent display device 100 is a display device capable of displaying an image while being able to see a background by being transparent. That is, the transparent display device 100 may transmit light while emitting a predetermined light to display an image. A detailed description of the transparent display device 100 will be described later with reference to FIGS. 3 to 5 .

The reflective mirror 200 is disposed on one surface of the transparent display device 100 . Hereinafter, for convenience of description, one surface of the transparent display device 100 is defined as the front surface of the transparent display device 100 , and the opposite surface of the one surface of the transparent display device 100 is defined as the front surface of the transparent display device 100 . It is defined as the back (背面). The reflective mirror 200 is disposed in a direction in which the transparent display device 100 displays an image. The reflective mirror 200 may be a concave mirror in which a surface facing the front of the transparent display device 100 is concave.

The reflective mirror 200 reflects the image of the transparent display device 100 , and thus the image reflected by the reflective mirror 200 is a floating image on the rear surface of the transparent display device 100 through the transparent display device 100 . (floating image). The floating image is an image displayed in a space separated by a predetermined distance from the display surface of the transparent display device 100 , and refers to an image displayed as if floating at a predetermined distance from the transparent display device 100 . A method for the floating image display device according to an embodiment of the present invention to display a floating image using the transparent display device 100 and the reflective mirror 200 will be described later with reference to FIGS. 8 to 10 , 12 and 13 . do.

The reflection mirror 200 may be formed of a spherical mirror curved inward as shown in FIG. 6A , but is not limited thereto. For example, the reflection mirror 200 has an inwardly curved shape like a spherical mirror, but may be formed to be larger or smaller than the curvature of the spherical mirror.

In addition, the reflective mirror 200 may be formed as a mirror curved inward only in the long direction (x-axis direction) of the transparent display device as shown in FIG. 6B . However, in this case, the floating image is formed only in the long direction (x-axis direction) of the transparent display device, and it is difficult to form the floating image in the single direction (y-axis direction).

In addition, the reflective mirror 200 may be formed as a mirror curved inward only in one direction (y-axis direction) of the transparent display device as shown in FIG. 6C . However, in this case, the floating image is formed only in one direction (y-axis direction) of the transparent display device, and it is difficult to form the floating image in the long direction (x-axis direction).

The reflective mirror housing cover 300 is formed to have a larger size than the reflective mirror 200 to accommodate the reflective mirror 200 in order to protect the reflective mirror 200 from external impact. It should be noted that the reflective mirror storage cover 300 may be formed of plastic such as polycarbonate and polyethylene terephthalate, but is not limited thereto. The reflective mirror accommodation cover 300 may be fixed using a fixing member such as the transparent display device 100 and a screw or an adhesive member such as an adhesive and an adhesive film. Alternatively, the reflective mirror accommodation cover 300 may be fixed to a support for supporting the reflective mirror 200 using a fixing member or an adhesive member. Alternatively, the reflective mirror housing cover 300 may be fixed to a guide rail for moving the reflective mirror 200 using a fixing member or an adhesive member.

FIG. 3 is an exemplary view showing the transparent display device of FIG. 2 . Referring to FIG. 3 , the transparent display device 100 according to the embodiment of the present invention has been mainly described as being implemented as an organic light emitting display, but a liquid crystal display or electrophoresis It can also be implemented as an electrophoresis display.

Referring to FIG. 3 , the transparent display device 100 according to the embodiment of the present invention includes a transparent display panel 110 , a gate driver 120 , and a source drive integrated circuit (hereinafter referred to as “IC”) 130 . ), a flexible film 140 , a circuit board 150 , and a timing controller 160 .

The transparent display panel 110 includes a lower substrate 111 , an upper substrate 112 , and a liquid crystal layer interposed between the lower substrate 111 and the upper substrate 112 . Thin film transistors and organic light emitting layers may be provided on the lower substrate 111 . The upper substrate 112 may be an encapsulation substrate.

In the display area DA of the transparent display panel 110 , gate lines, data lines, and pixels disposed at intersections of gate lines and data lines are formed. Pixels in the display area DA may display an image. A detailed description of each of the pixels in the display area DA will be described later with reference to FIGS. 4 and 5 .

The gate driver 120 supplies gate signals to the gate lines according to a gate control signal input from the timing controller 160 . 3 illustrates that the gate driver 120 is formed on one side of the outer side of the display area DA of the transparent display panel 110 by a gate driver in panel (GIP) method, but is not limited thereto. That is, the gate driver 120 may be formed in the GIP method on both sides of the display area DA of the transparent display panel 110 , or manufactured as a driving chip, mounted on a flexible film, and performed by tape automated bonding (TAB). In this way, it may be attached to the transparent display panel 110 .

The source drive IC 130 receives digital video data and a source control signal from the timing controller 160 . The source drive IC 130 converts digital video data into analog data voltages according to a source control signal and supplies them to data lines. When the source drive IC 130 is manufactured as a driving chip, it may be mounted on the flexible film 140 in a chip on film (COF) or chip on plastic (COP) method.

The size of the lower substrate 111 is larger than the size of the upper substrate 112 , so that a portion of the upper surface of the lower substrate 111 is exposed. Pads such as data pads are provided on a portion of the exposed upper surface of the lower substrate 111 . Wires connecting the pads and the source drive IC 130 and wires connecting the pads and the wires of the circuit board 150 may be formed on the flexible film 140 . The flexible film 140 is attached on the pads using an anisotropic conducting film, whereby the pads and the wirings of the flexible film 140 can be connected.

The circuit board 150 may be attached to the flexible films 140 . A plurality of circuits implemented with driving chips may be mounted on the circuit board 150 . For example, the timing controller 160 may be mounted on the circuit board 150 . The circuit board 150 may be a printed circuit board or a flexible printed circuit board.

The timing controller 160 receives digital video data and a timing signal from an external system board (not shown). The timing controller 60 generates a gate control signal for controlling the operation timing of the gate driver 20 and a source control signal for controlling the source driver ICs 30 based on the timing signal. The timing controller 60 supplies the gate control signal to the gate driver and supplies the source control signal to the source drive ICs 30 .

FIG. 4 is an exemplary view showing a pixel included in the display area of FIG. 3 . FIG. 5 is a cross-sectional view taken along line II′ of FIG. 4 .

4 and 5 , the pixel P includes a transmissive part TA and a light emitting part EA. The light emitting unit EA may include a plurality of light emitting units. 4 and 5 illustrate that the light emitting unit EA includes the red light emitting unit RE, the green light emitting unit GE, and the blue light emitting unit BE, but is not limited thereto.

The transmission part TA is an area that substantially passes light incident from the outside. The light emitting part EA is an area that emits light, the red light emitting part RE is an area that emits red light, the green light emitting part GE is an area that emits green light, and the blue light emitting part BE emits blue light. area that emits light.

A transistor element T, an anode electrode AND, an organic layer EL, and a cathode electrode CAT are provided in each of the red light emitting part RE, the green light emitting part GE, and the blue light emitting part BE, as shown in FIG. 5 . can be provided.

The transistor device T includes an active layer ACT provided on the lower substrate 111 , a first insulating layer I1 provided on the active layer ACT, and a gate electrode GE provided on the first insulating layer I1 . ), the second insulating layer I2 provided on the gate electrode GE, the second insulating layer I2 provided on the second insulating layer I2, and connected to the active layer ACT through the first and second contact holes CNT1 and CNT2. It includes a source electrode SE and a drain electrode DE. In FIG. 5 , the transistor element T has been exemplified to be formed in a top gate method, but is not limited thereto, and may be formed in a bottom gate method.

The anode electrode AND is connected to the drain electrode DE of the transistor element T through the third contact hole CNT3 penetrating the interlayer insulating layer ILD provided on the source electrode SE and the drain electrode DE. do. A barrier rib is provided between the anode electrodes AND adjacent to each other, so that the anode electrodes AND adjacent to each other may be electrically insulated.

An organic layer EL is provided on the anode electrode AND. The organic layer EL may include a hole transporting layer, an organic light emitting layer, and an electron transporting layer. A cathode electrode CAT is provided on the organic layer EL and the barrier rib W. When a voltage is applied to the anode electrode AND and the cathode electrode CAT, holes and electrons move to the organic light emitting layer through the hole transport layer and the electron transport layer, respectively, and combine with each other in the organic light emitting layer to emit light.

5 illustrates that the transparent display panel 110 is implemented in a top emission method, but is not limited thereto, and may be implemented in a bottom emission method. Since the reflective mirror 200 should be disposed in the emission direction of the transparent display panel 110 , it is disposed on the upper substrate 112 of the transparent display panel 110 in the case of the top emission type, and is disposed on the upper substrate 112 of the transparent display panel 110 in the case of the bottom emission type. It is preferably disposed under the lower substrate 111 of 110 .

In the top emission method, since the light of the organic layer EL is emitted toward the upper substrate, the transistor T may be widely provided under the barrier rib W and the anode electrode AND. Accordingly, the top emission method has an advantage in that the design area of the transistor T is wider than that of the bottom emission method. In the top emission method, it is preferable that the anode electrode AND is formed of a metal material having a high reflectance such as aluminum, a laminate structure of aluminum and ITO, and the cathode electrode CAT is formed of a transparent metal material such as ITO or IZO.

As described above, each of the pixels P of the transparent display device 100 according to the embodiment of the present invention has a transmission portion TA that allows light incident from the outside to pass therethrough and a light emitting portion EA that emits light. ) is included. As a result, in the embodiment of the present invention, the image reflected by the reflective mirror 200 is displayed as a floating image on the rear surface of the transparent display device 100 on which the image is displayed through the transmission parts TA of the transparent display device 100 . can be On the other hand, when the image displayed on the transparent display device 100 is a two-dimensional image, the floating image is viewed by the viewer in two dimensions.

FIG. 7 is a side cross-sectional view illustrating an example of the floating image display device of FIG. 1 in detail. Referring to FIG. 7 , in the floating image display device according to the embodiment of the present invention, in addition to the transparent display device 100 , the reflective mirror 200 , and the reflective mirror housing cover 300 , the curvature of the reflective mirror 200 is adjusted. It further includes a curvature variable unit 400 for.

The transparent display panel 110 , the reflective mirror 200 , and the reflective mirror accommodation cover 300 of FIG. 7 have already been described in detail with reference to FIGS. 2 to 6 .

The reflective mirror 200 may include a base plate 210 and a mirror reflective layer 220 provided on the base plate 210 as shown in FIG. 7 .

The base plate 210 may be formed to have a predetermined curvature. In addition, the base plate 210 has a material whose curvature can be changed when a predetermined force is applied by the curvature variable part to adjust the curvature of the reflective mirror 200 as shown in FIGS. 8 to 10 . For example, the base plate 210 may be made of plastic such as polycarbonate and polyethylene terephthalate.

The specular reflection layer 220 may be formed of any material as long as it is a material capable of mirror reflection. In addition, the mirror reflection layer 220 may be attached to the base plate 210 after being manufactured in the form of a sheet, but is not limited thereto.

The curvature variable part 400 includes a support 410 , a fixing member 420 , a tension providing means 430 , and a tension adjusting part 440 .

The support 410 is located on the rear surface of the reflective mirror 200 , and serves to support the reflective mirror 200 . The support 410 may be fixed to the reflective mirror receiving cover 300 .

The fixing member 420 fixes the support 410 and the base plate 210 of the reflective mirror 200 . The fixing member 420 may fix the center of the support 410 and the center of the base plate 210 of the reflective mirror 200 .

The tension providing means 430 connects the tension adjusting unit 440 disposed at each of both ends of the support 410 and both ends of the base plate 210 of the reflective mirror 200 with a predetermined tension. That is, the center of the reflective mirror 200 is fixed to the support 410 , a predetermined tension is provided to both ends, and the base plate 210 of the reflective mirror 200 has a curvature when a predetermined force is applied. Since it is formed of a changeable material, the curvature of the reflection mirror 200 may be changed according to the tension of the tension providing means 430 .

The tension adjusting unit 440 may be disposed at each of both ends of the support 410 . The tension adjusting unit 440 may adjust the tension of the tension providing means 430 . For example, the tension adjusting unit 440 may adjust the tension providing means 430 to connect the support 410 and the reflective mirror 200 with a first tension, in this case the reflective mirror 200 is It may have a first curvature r1. In addition, the tension adjusting unit 400 may adjust the tension providing means 430 to connect the support 410 and the reflective mirror 200 with a second tension, in this case the reflective mirror 200 is a second tension as shown in FIG. It may have a curvature r2. Furthermore, the tension adjusting unit 400 may adjust the tension providing means 430 to connect the support 410 and the reflective mirror 200 with a third tension, in this case the reflective mirror 200 is a third tension, as shown in FIG. It may have a curvature r3. Meanwhile, it should be noted that the tension providing means 430 is a string, and the tension adjusting unit 440 may be an electric reel that winds and unwinds the string, but is not limited thereto.

As described above, in the embodiment of the present invention, the curvature of the reflective mirror 200 may be varied by using the curvature variable unit 400 . When the curvature of the reflective mirror 200 is changed, the focal length of the reflective mirror 200 is changed, and thus a position at which a floating image is displayed may be changed. Hereinafter, the display position of the floating image according to the variable curvature of the reflective mirror 200 will be described in detail in conjunction with FIGS. 8 to 10 .

8 is an exemplary view illustrating a floating image displayed by a transparent display panel and a reflective mirror having a first curvature. 8 shows a floating image displayed when the reflective mirror 200 is adjusted to have a first curvature r1 by the curvature variable unit 400 .

The floating image fim is an image displayed in a space separated by a predetermined distance from the display surface of the transparent display device 100 , and refers to an image displayed as if floating at a predetermined distance from the transparent display device 100 . The floating image fim may be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in FIG. 8 . Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A , the image im displayed on the transparent display panel 110 may be displayed in the opposite direction. Alternatively, when the reflective mirror 200 is a mirror curved only in the long direction (x-axis direction) as shown in FIG. 6B , the left and right sides of the image im displayed on the transparent display panel 110 may be displayed oppositely. Alternatively, when the reflective mirror 200 is curved only in one direction (y-axis direction) as shown in FIG. 6C , the top and bottom of the image im displayed on the transparent display panel 110 may be displayed in reverse.

In FIG. 8 , the plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 , and the plane at the center of the reflective mirror 200 on which the image displayed on the transparent display panel 110 is reflected is shown. A second plane P2 is called, and a plane in which an image reflected by the reflection mirror 200 is displayed as a floating image fim is defined as a third plane P3. At this time, the distance (i) between the second plane (P2) and the third plane (P3) is the distance (o) between the first plane (P1) and the second plane (P2) and the focal length ( f) may vary.

In Equation 1, "i" is the distance between the second plane P2 and the third plane P3, "o" is the distance between the first plane P1 and the second plane P2, and "f" represents the focal length.

Meanwhile, the distance d between the first plane P1 and the third plane P3 is the distance from the transparent display panel 110 to the floating image fim, and the second plane P2 and the third plane ( It corresponds to the distance obtained by subtracting the distance (o) between the first plane (P1) and the second plane (P2) from the distance (i) between P3). Accordingly, the distance d between the first plane P1 and the third plane P3 may be defined as in Equation (2).

In addition, the magnification m representing the size of the floating image fim compared to the size of the image im of the transparent display panel may be defined as in Equation 3 above.

In FIG. 8, the distance (o) between the first plane (P1) and the second plane (P2): the focal length (f) is exemplified as 5:3, in this case the first plane (P1) and the third plane ( The distance d between P3) is "5f/6", and the magnification (m) is 1.5 times.

9 is an exemplary view illustrating a floating image displayed by a transparent display panel and a reflective mirror having a second curvature. 9 shows a floating image displayed when the reflection mirror 200 is adjusted to have a second curvature r2 greater than the first curvature r1 by the curvature variable unit 400 .

The floating image fim is an image displayed in a space separated by a predetermined distance from the display surface of the transparent display device 100 , and refers to an image displayed as if floating at a predetermined distance from the transparent display device 100 . The floating image fim may be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in FIG. 9 . Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A , the image im displayed on the transparent display panel 110 may be displayed in the opposite direction. Alternatively, when the reflective mirror 200 is a mirror curved only in the long direction (x-axis direction) as shown in FIG. 6B , the left and right sides of the image im displayed on the transparent display panel 110 may be displayed oppositely. Alternatively, when the reflective mirror 200 is a mirror curved only in one direction (y-axis direction) as shown in FIG. 6C , the top and bottom of the image im displayed on the transparent display panel 110 may be displayed in reverse.

In FIG. 9 , as shown in FIG. 8 , the plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 , and the reflection mirror 200 on which the image displayed on the transparent display panel 110 is reflected. A plane in the center is called a second plane P2, and a plane in which an image reflected by the reflection mirror 200 is displayed as a floating image fim is defined as a third plane P3. Also, the distance i between the second plane P2 and the third plane P3 may be defined as in Equation 1, and the distance d between the first plane P1 and the third plane P3 ) can be defined as in Equation 2. In addition, the magnification m representing the size of the floating image fim compared to the size of the image im of the transparent display panel may be defined as in Equation 3 above.

When the curvature of the reflection mirror 200 is changed, the focal length f is changed. As the curvature of the reflection mirror 200 increases, the focal length f increases. For example, when the reflection mirror 200 has a first curvature r1, as shown in FIG. 8 , the distance o between the first plane P1 and the second plane P2: the focal length f is 5 Compared to :3, when the reflective mirror 200 has a second curvature r2, as shown in FIG. 9, the distance o between the first plane P1 and the second plane P2: focal length f may be 10:7. When the reflective mirror 200 has a second curvature r2, the distance d between the first plane P1 and the third plane P3 is “40f/21≒2f”, and the magnification m is It is doubled by 2.33.

8 and 9 , in the embodiment of the present invention, the focal length of the reflection mirror 200 may be adjusted by adjusting the curvature of the reflection mirror 200 . As a result, in the embodiment of the present invention, the position at which the floating image fim is displayed and the magnification m of the floating image fim can be adjusted. That is, in the embodiment of the present invention, the floating image fim can be displayed at a position desired by the viewer or at a magnification desired by the viewer by adjusting the curvature of the reflection mirror 200 using the tension providing means 430 .

10 is an exemplary view illustrating a floating image displayed by a transparent display panel and a reflective mirror having a third curvature. 10 shows a floating image displayed when the reflection mirror 200 is adjusted to have a third curvature r3 greater than the second curvature r2 by the curvature variable unit 400 .

In FIG. 10 , the plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 as shown in FIG. 8 , and the reflective mirror 200 on which the image displayed on the transparent display panel 110 is reflected. A plane in the center is called a second plane P2, and a plane in which an image reflected by the reflection mirror 200 is displayed as a floating image fim is defined as a third plane P3.

Referring to FIG. 10 , when the curvature of the reflective mirror 200 is changed, the focal length f is changed. As the curvature of the reflection mirror 200 increases, the focal length f increases. As shown in FIG. 10 , when the reflective mirror 200 has a third curvature r3 , the focal length f is positioned outside the rear surface of the transparent display panel 110 , and in this case, the viewer You will see a floating image (fim) of a virtual image located in the back.

The distance i between the second plane P2 and the third plane P3 on which the floating image fim of the virtual image is displayed may be defined as in Equation 1.

The distance d between the first plane P1 and the third plane P3 on which the floating image fim of the virtual image is displayed may be defined as in Equation 5.

In addition, the magnification m representing the size of the floating image fim of the virtual image relative to the size of the image im of the transparent display panel may be defined as in Equation 6.

When the reflection mirror 200 has a third curvature r3, the distance o between the first plane P1 and the second plane P2 as shown in FIG. 10: the focal length f can be 5:6 have. In this case, the distance d between the first plane P1 and the third plane P3 is “35f/6≒6f”, and the magnification is 6 times.

10 , in the embodiment of the present invention, the focal length of the reflective mirror 200 may be adjusted to the outside of the rear surface of the transparent display panel 110 by adjusting the curvature of the reflective mirror 200 . As a result, the embodiment of the present invention may display a floating image fim as a virtual image on the back of the reflection mirror 200 .

On the other hand, if the reflective mirror 200 is a plane mirror having an infinite focal length (f), the distance (i) between the second plane (P2) and the third plane (P3) is the first plane (P1) and the second plane (P1). It can be called the distance o between the planes P2, and in this case, the distance d between the first plane P1 and the third plane P3 is the first plane P1 and the second plane P2. It can be twice the distance (o) between them. That is, in the embodiment of the present invention, the floating image fim of the virtual image is displayed on the back of the reflective mirror 200 at a distance twice or more than the distance o between the transparent display panel 110 and the reflective mirror 200 . can For this reason, when the embodiment of the present invention is applied to a head up display (HUD) applied to a vehicle, by displaying a floating image (fim) as a virtual image on the back of the reflection mirror 200, the driver's eyes It can be implemented so that the head-up display information can be viewed while minimizing the change in the focal length of the camera.

11 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail. Referring to FIG. 11 , in the floating image display device according to the embodiment of the present invention, in addition to the transparent display device 100 , the reflective mirror 200 , and the reflective mirror receiving cover 300 , the position of the reflective mirror 200 is adjusted. It further includes a position variable unit 500 for.

The transparent display panel 110 , the reflective mirror 200 , and the reflective mirror accommodation cover 300 of FIG. 11 have already been described in detail above with reference to FIGS. 2 to 7 .

The position variable unit 500 includes a support 510 , a fixing member 520 , a guide rail 530 , a first moving unit 540 , a second moving unit 550 , and a moving unit adjusting unit 560 . .

The support 510 is located on the rear surface of the reflective mirror 200 , and serves to support the reflective mirror 200 .

The fixing member 520 fixes the support 510 and the base plate 210 of the reflective mirror 200 . The fixing member 520 may fix the center of the support 510 and the center of the base plate 210 of the reflective mirror 200 .

The guide rail 530 is positioned on the side of the reflective mirror 200 , and may be fixed to the reflective mirror receiving cover 300 . The first and second moving means 540 and 550 are inserted into the guide rail 530 , and the first and second moving means 540 and 550 are electrically guide rails under the control of the moving means adjusting unit 560 . It can move along 530 . The first and second moving means 540 and 550 may be implemented as rollers.

The first moving means 540 may be connected to the rear surface of one end of the base plate 210 of the reflection mirror 200 . The second moving means 550 may be connected to one end of the support 510 . For this reason, when the first and second moving means 540 and 550 move along the guide rail 530 , the reflective mirror 200 also moves. In particular, since the guide rail 530 is disposed in the thickness direction (z-axis direction) of the transparent display panel 110 , the reflective mirror 200 moves along the thickness direction (z-axis direction) of the transparent display panel 110 . do. Any one of the first and second moving means 540 and 550 may be omitted.

The moving means adjusting unit 560 may be disposed at one end of the guide rail 530 . The moving means adjusting unit 560 may adjust the positions of the first and second moving means 540 and 550 . For example, the moving means adjusting unit 560 maintains the distance between the reflective mirror 200 and the transparent display panel 110 as the first distance by moving the first and second means 540 and 550 to the first position. can Also, the moving means adjusting unit 560 may maintain the distance between the reflective mirror 200 and the transparent display panel 110 as the second distance by moving the first and second moving means 540 and 550 to the second position. have.

Meanwhile, in FIG. 11 , for convenience of explanation, it is exemplified that the floating image display device according to an embodiment of the present invention includes only the position variable unit 500 except for the variable curvature unit 400 of FIG. 7 . However, the floating image display device according to the embodiment of the present invention may include both the curvature variable part 400 and the position variable part 500 of FIG. 7 .

As described above, in the embodiment of the present invention, the distance between the reflective mirror 200 and the transparent display panel 110 may be adjusted by using the position variable unit 500 . When the distance between the reflective mirror 200 and the transparent display panel 110 is adjusted, the position at which the floating image is displayed may be changed. Hereinafter, the display position of the floating image according to the variable position of the reflection mirror 200 will be described in detail in conjunction with FIGS. 12 and 13 .

12 is an exemplary view illustrating a floating image displayed when a distance between a transparent display panel and a reflective mirror is a first distance. 12 shows a floating image displayed when the reflective mirror 200 and the transparent display panel 110 are adjusted to be separated by a first distance s1 by the position variable unit 500 .

The floating image fim is an image displayed in a space separated by a predetermined distance from the display surface of the transparent display device 100 , and refers to an image displayed as if floating at a predetermined distance from the transparent display device 100 . The floating image fim may be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in FIG. 12 . Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A , the image im displayed on the transparent display panel 110 may be displayed in the opposite direction. Alternatively, when the reflective mirror 200 is a mirror curved only in the long direction (x-axis direction) as shown in FIG. 6B , the left and right sides of the image im displayed on the transparent display panel 110 may be displayed oppositely. Alternatively, when the reflective mirror 200 is a mirror curved only in one direction (y-axis direction) as shown in FIG. 6C , the top and bottom of the image im displayed on the transparent display panel 110 may be displayed in reverse.

In FIG. 12 , the plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 , and the plane of the center of the reflective mirror 200 on which the image displayed on the transparent display panel 110 is reflected is shown. A second plane P2 is called, and a plane in which an image reflected by the reflection mirror 200 is displayed as a floating image fim is defined as a third plane P3. In the embodiment of the present invention, the distance o between the first plane P1 and the second plane P2 is adjusted to the first distance s1.

At this time, the distance (i) between the second plane (P2) and the third plane (P3) is the distance (o) between the first plane (P1) and the second plane (P2) and the focal length ( f) may vary. In addition, the distance d between the first plane P1 and the third plane P3 may be defined as in Equation (2). In addition, the magnification m representing the size of the floating image fim compared to the size of the image im of the transparent display panel may be defined as in Equation 3 above.

12 illustrates that the distance (o) between the first plane (P1) and the second plane (P2): the focal length (f) is 5:3, in this case the first plane (P1) and the third plane ( The distance d between P3) is "5f/6", and the magnification (m) is 1.5 times.

13 is an exemplary view illustrating a floating image displayed when the distance between the transparent display panel and the reflective mirror is a second distance. 13 shows a floating image displayed when the reflective mirror 200 and the transparent display panel 110 are adjusted to be separated by a second distance s2 by the position variable unit 500 .

The floating image fim is an image displayed in a space separated by a predetermined distance from the display surface of the transparent display device 100 , and refers to an image displayed as if floating at a predetermined distance from the transparent display device 100 . The floating image fim may be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in FIG. 13 . Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A , the image im displayed on the transparent display panel 110 may be displayed in the opposite direction. Alternatively, when the reflective mirror 200 is a mirror curved only in the long direction (x-axis direction) as shown in FIG. 6B , the left and right sides of the image im displayed on the transparent display panel 110 may be displayed oppositely. Alternatively, when the reflective mirror 200 is a mirror curved only in one direction (y-axis direction) as shown in FIG. 6C , the top and bottom of the image im displayed on the transparent display panel 110 may be displayed in reverse.

In FIG. 13 , the plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 , and the plane of the center of the reflective mirror 200 on which the image displayed on the transparent display panel 110 is reflected is shown. A second plane P2 is called, and a plane in which an image reflected by the reflection mirror 200 is displayed as a floating image fim is defined as a third plane P3. In the embodiment of the present invention, the distance o between the first plane P1 and the second plane P2 is adjusted to the second distance s2.

At this time, the distance (i) between the second plane (P2) and the third plane (P3) is the distance (o) between the first plane (P1) and the second plane (P2) and the focal length ( f) may vary. In addition, the distance d between the first plane P1 and the third plane P3 may be defined as in Equation (2). In addition, the magnification m representing the size of the floating image fim compared to the size of the image im of the transparent display panel may be defined as Equation 3 above.

When the distance o between the reflective mirror 200 and the transparent display panel 110 is changed, the distance d between the first plane P1 and the third plane P3 is changed. As the distance o between the reflective mirror 200 and the transparent display panel 110 increases, the distance d between the first plane P1 and the third plane P3 increases. For example, when the distance o between the reflective mirror 200 and the transparent display panel 110 is the first distance s1, as shown in FIG. 12 , the distance between the first plane P1 and the second plane P2 is (o): When the focal length f is 5:3, when the distance o between the reflective mirror 200 and the transparent display panel 110 is the second distance s2, as shown in FIG. 13 , the first plane A distance (o) between (P1) and the second plane (P2): a focal length (f) may be 11:6. When the distance o between the reflective mirror 200 and the transparent display panel 110 is the second distance s2, the distance d between the first plane P1 and the third plane P3 is “11f/30” ≒ 1/3f", and the magnification (m) is 1.2 times.

12 and 13 , in the embodiment of the present invention, the floating image fim is displayed position and the floating image fim by adjusting the distance between the reflective mirror 200 and the transparent display panel 110 . The magnification (m) of can be adjusted. That is, in the embodiment of the present invention, the distance between the reflective mirror 200 and the transparent display panel 110 is adjusted by adjusting the positions of the first and second moving means 540 and 550 using the moving means adjusting unit 560 . can be adjusted, so that the floating image (fim) can be displayed at the position desired by the viewer or at the desired magnification by the viewer.

14 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail. 14 , the floating image display device according to the embodiment of the present invention includes a transparent display panel ( It may include a λ/4 plate (quarter wave plate, 610) and a polarizing plate (620) attached to the rear surface of the 110).

The transparent display panel 110 , the reflective mirror 200 , and the reflective mirror accommodation cover 300 of FIG. 14 have already been described in detail above with reference to FIGS. 2 to 7 . In addition, the curvature variable part 400 of FIG. 14 has already been described in detail above in conjunction with FIG. 7 .

The polarizing plate 620 can pass only horizontal or vertical polarization, and the λ/4 plate 610 retards incident light by λ/4. In the λ/4 plate 610 and the polarizing plate 620 , external light incident on the rear surface of the transparent display panel 110 is transmitted through the transmission portions of the transparent display panel 110 and is reflected by the reflective mirror 200 , and then again By being transmitted through the transparent portions of the transparent display panel 110 , it is possible to prevent recognition by a viewer.

For example, when the polarizing plate 620 passes only horizontally polarized light (⊙), the horizontally polarized light (⊙) passing through the polarizing plate 620 is phase delayed by λ/4 by the λ/4 plate 610, and is reflected It is reflected by the mirror 200 as light delayed by 3λ/4. The light delayed by 3λ/4 by the reflection mirror 200 is phase delayed again by λ/4 by the λ/4 plate 610 and converted into vertical polarization, so the polarizing plate 620 that passes only horizontally polarized light (⊙) cannot pass through

Meanwhile, in FIG. 11 , for convenience of explanation, it is exemplified that the floating image display device according to an embodiment of the present invention includes only the variable curvature part 400 of FIG. 7 , excluding the position variable part 500 of FIG. 11 . However, the floating image display device according to the embodiment of the present invention may include both the curvature variable unit 400 of FIG. 7 and the position variable unit 500 of FIG. 11 . Alternatively, the floating image display device according to the embodiment of the present invention may include only the position variable unit 500 of FIG. 11 except for the variable curvature unit 400 of FIG. 7 as shown in FIG. 11 .

As described above, in the embodiment of the present invention, external light incident on the rear surface of the transparent display panel 110 by using the λ/4 plate 610 and the polarizing plate 620 passes through the transmission portions of the transparent display panel 110 . It is transmitted through the reflective mirror 200 , and then transmitted through the transparent portions of the transparent display panel 110 , thereby preventing recognition by the viewer.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present invention. . Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: transparent display device 110: transparent display panel
111: lower substrate 112: upper substrate
120: gate driver 130: source drive IC
140: flexible film 150: circuit board
160: timing controller 200: reflective mirror
210: base plate 220: mirror reflective layer
300: reflective mirror storage cover 400: curvature variable portion
410, 510: support 420, 520: fixing member
430: tension providing means 440: tension adjustment unit
500: variable position 530: guide rail
540: first moving means 550: second moving means
560: moving means adjustment unit 610: λ/4 plate
620: polarizer

Claims (12)

a transparent display device including a transparent display panel in which pixels each including a transmitting portion for transmitting light and a light emitting portion for emitting light on one surface are provided; and
a reflective mirror disposed on the one surface of the transparent display panel and reflecting the image displayed on the transparent display panel to be displayed as a floating image on the outside of the opposite surface of the one surface of the transparent display panel through the transmitting portions of the pixels; ,
The reflective mirror is
a base plate having a predetermined curvature and made of a material capable of changing the curvature when a predetermined force is applied; and
and a mirror reflection layer formed on the base plate. a transparent display device including a transparent display panel in which pixels each including a transmitting portion for transmitting light and a light emitting portion for emitting light on one surface are provided; and
and a reflective mirror disposed on the one surface of the transparent display panel,
The reflective mirror reflects the image displayed on the transparent display panel to be displayed as a floating image of a virtual image behind the reflective mirror,
The reflective mirror is
a base plate having a predetermined curvature and made of a material capable of changing the curvature when a predetermined force is applied; and
and a mirror reflection layer formed on the base plate. 3. The method of claim 1 or 2,
The reflective mirror is any one of a spherical mirror, a mirror curved along a long direction of the transparent display panel, and a mirror curved along a single direction of the transparent display panel. delete The method of claim 1,
Floating image display device further comprising a curvature variable unit for changing the curvature of the reflection mirror. 6. The method of claim 5,
When the reflective mirror has a first curvature by the curvature variable unit, the floating image is positioned farther away from the transparent display panel than when the reflective mirror has a second curvature greater than the first curvature. 6. The method of claim 5,
The curvature variable part,
a support positioned on the rear surface of the reflective mirror and configured to support the reflective mirror;
a fixing member for fixing the rear surface of the reflective mirror to the support;
Tension adjustment units disposed at both ends of the support; and
and tension providing means for connecting the tension adjusting unit and both ends of the reflective mirror with a predetermined tension, the tension being variable by the tension adjusting unit. The method of claim 1,
The floating image display device further comprising a position variable unit for changing a distance between the reflective mirror and the transparent display panel. 9. The method of claim 8,
When the distance between the reflective mirror and the transparent display panel is a first distance, the floating image is located farther from the transparent display panel than when the second distance is greater than the first distance. 9. The method of claim 8,
The position variable part,
a guide rail disposed on a side surface of the reflective mirror in a thickness direction of the transparent display panel;
a first moving means connected to the rear surface of the reflection mirror and inserted into the guide rail to move along the guide rail; and
Floating image display device including a moving means adjusting unit for adjusting the position of the first moving means. 3. The method of claim 1 or 2,
The transparent display device further includes a λ/4 plate and a polarizing plate disposed on a surface opposite to one surface of the transparent display panel. 3. The method of claim 2,
It further includes a variable curvature part for changing the curvature of the reflective mirror, and when the reflective mirror has a third curvature by the variable curvature part, the focal length of the reflective mirror is located outside the opposite surface of the one surface of the transparent display panel Floating image display device.

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